Mac clock timezone issue

[BenFromPerth23]

Hey, I flew to the USA today from Australia, but my clock still shows Australian time. It's connected to the internet, "Set date and time automatically" is checked, and when that didn't work, I manually changed the time zone to "Apple Americas/U.S."

Any idea why it's not displaying the correct time?

 

[BenFromPerth23]

Update: Still have the problem. Changed the time manually. Then clicked automatic and it reverted back to Aussie time. It can't tell where I am...